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As most adenoviruses infect liver tissues, we intratumorally injected viruses at 1 × 109 this website p.f.u./mouse, with cisplatin administration intraperitoneally. The operation schedule was the same as that for the animal experiments. After two-week treatment, blood samples were extracted from the tail vein. The white blood cell count, red blood cell count and platelet count were determined as measures of bone marrow toxicity, whereas creatinine, and GOT plus GPT were recorded Vistusertib as measures of kidney and liver toxicity, respectively. Statistical analysis The results of the statistical analyses were presented as means ± standard deviation. For comparison of individual time points, differences between groups

were tested by unpaired Student’s t-test. Survival analysis was computed by the Kaplan-Meier method and compared by the log-rank test. All p values were two sides, and significant difference existed if p < 0.05. Results Expression of recombinant human endostatin in vitro LLC cell line was transduced with 100 MOI of Ad-hEndo or Ad-null. 48 hr later, concentrated cultured supernatants were collected, mixed with 2× sample buffer, and then separated on a 12% SDS/PAGE gel. After transferred onto the PVDF membrane, followed by being incubated with the primary antibody and second antibody, a distinct band about 20 KD, corresponding to the volume of endostatin, was visualized in the Ad-hEndo treated cells, but not in Ad-null transduced and nontransduced cells

(Figure 1). Figure 1 Expression of recombinant human endostatin. Recombinant human endostatin was expressed as a single band of appropriate 20 KD in Ad-hEndo transfected Protirelin LLC cells(1), while no band was detected in Ad-null (2) transfected or untreated(3) tumor cells. Combination treatment significantly reduced tumor growth and prolonged life span in vivo 7 d after the Lewis lung cancer model was established, the C57BL/6 mice were randomized to receive administration with cisplatin, Ad-Endo, cisplatin plus Ad-Endo, Ad-null or NS (with the last two treatments as the controls). All mice were monitored every 4 d for changes in tumor growth. At Day 50, all the mice were sacrificed. Treatment with cisplatin or Ad-Endo as the single agent resulted in a 19.6% or 38.4% regression of tumor growth and prolonged survival time compared with the control groups (Ad-null or NS). Furthermore, the combination group showed reduced tumor volume by 69.5% and longer life span(P < 0.05) (Figure 2). Figure 2 Tumor suppression and survival advantage in C57BL/6 mice bearing LLC.